#region License
// Copyright 2008-2009 Jeremy Skinner (http://www.jeremyskinner.co.uk)
// 
// Licensed under the Apache License, Version 2.0 (the "License"); 
// you may not use this file except in compliance with the License. 
// You may obtain a copy of the License at 
// 
// http://www.apache.org/licenses/LICENSE-2.0 
// 
// Unless required by applicable law or agreed to in writing, software 
// distributed under the License is distributed on an "AS IS" BASIS, 
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
// See the License for the specific language governing permissions and 
// limitations under the License.
// 
// The latest version of this file can be found at http://www.codeplex.com/FluentValidation
#endregion

namespace FluentValidation.Validators {
    using System;
    using Results;

    public class DelegatingValidator<T, TProperty> : IPropertyValidator<T, TProperty>, IDelegatingValidator {
        readonly Func<T, bool> _condition;

        public DelegatingValidator(Func<T, bool> condition, IPropertyValidator<T, TProperty> innerValidator) {
            _condition = condition;
            InnerValidator = innerValidator;
        }

        public IPropertyValidator<T, TProperty> InnerValidator { get; private set; }

        #region IDelegatingValidator Members
        IPropertyValidator IDelegatingValidator.InnerValidator {
            get { return InnerValidator; }
        }
        #endregion

        #region IPropertyValidator<T,TProperty> Members
        public PropertyValidatorResult Validate(PropertyValidatorContext<T, TProperty> context) {
            if (_condition(context.Instance)) {
                return InnerValidator.Validate(context);
            }
            return PropertyValidatorResult.Success();
        }
        #endregion
    }

    public interface IDelegatingValidator : IPropertyValidator {
        IPropertyValidator InnerValidator { get; }
    }
}